Berlin Charter Township is a charter township of Monroe County in the U.S. state of Michigan. At the 2000 census, the township population was 6,924. Berlin Charter Township was organized from the northern portion of previously established Frenchtown Charter Township, and the township boundaries has been in place since 1867. As part of the Monroe Metropolitan Area, the township is also classified as part of the much larger Metro Detroit region.
The Pointe Mouillee State Game Area is located within Berlin Charter Township. The township contains two listings on the National Register of Historic Places. The Detroit River Light is within the township's water boundaries, although the station is under the jurisdiction of the United States Coast Guard. The Jefferson Avenue-Huron River Bridge spans the Huron River, connecting Berlin to Brownstown Charter Township in Wayne County. The eastern portion of the township along Lake Erie is served by Jefferson Schools, while the rest of the township is served by Airport Community Schools.